I guess after the reviews I've read, I shouldn't be surprised something like this would happen, but out of the blue my firing button of my 50 watt istick just stopped functioning all together. Can't turn it on, can't do anything. Tried plugging it in to a power source, it's battery is full, but nothing happens when I hit the fire button. (Lol, yes, I tried hitting the button 5 times). I really loved my istick, so I'm extremely bummed about this. It's still in the 90 day warranty, so I'm waiting on an email back. Any thoughts?